Hello, I’m interested in this too. Do you normally get the bleeds at the correct time (ie after stopping utrogestan?).
Sounds like your oestrogen level has gone so low that your lining is no longer building up.
I have the issue that I still have my own period whenever it comes regardless of taking utrogestan. I’m paranoid that I’m not absorbing the utro for some reason and my oestrogen (50mg) is going unopposed. Currently bleeding every 21 days for 7+ days so I guess not an immediate issue for me! The bleeds are getting lighter and with no period cramps though despite being for so long so hopefully I’m approaching the situation you find yourself in! I missed a period entirely over summer too.
I would leave it another month and maybe ask for doctor advice then. If I start missing more I intend to do the same and hopefully get reassured.
How old are you by the way?